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Lennox Furnace Door Switch Replacement #51W15

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This video provides step-by-step instructions for replacing the door switch on Lennox furnaces. The most common reason for replacing the door switch is if the furnace isn’t turning on.

All of the information in this door switch replacement video is applicable to the following brands: Lennox

Tools needed: 1/4 inch socket

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Step By Step Instructions

1
Before you replace the door switch in your furnace first turn off the power to the furnace.
2
Unthread the retaining knobs securing the upper access panel and remove the panel.
3
Use a quarter-inch socket or nut driver to unthread the mounting screws securing the lower access panel.
4
Lift the panel up to remove.
5
If still intact, depress the tabs to release the door switch from the bracket.
6
Note the orientation of the wires then disconnect them from the switch.
7
Install the new door switch by first connecting the wires to the terminals.
8
Now snap the new switch into place in the bracket.
9
Replace the lower access panel by aligning the bottom edge first.
10
Thread and tighten the screws to secure.
11
Realign the top edge of the upper access panel then thread the retaining knobs to secure.
12
With the repair completed turn the power back on and your furnace should be ready for use.
Description
This video provides step-by-step instructions for replacing the door switch on Lennox furnaces. The most common reason for replacing the door switch is if the furnace isn’t turning on.

All of the information in this door switch replacement video is applicable to the following brands: Lennox

Tools needed: 1/4 inch socket

Connect With Us!
Step-By-Step Instructions
1
Before you replace the door switch in your furnace first turn off the power to the furnace.
2
Unthread the retaining knobs securing the upper access panel and remove the panel.
3
Use a quarter-inch socket or nut driver to unthread the mounting screws securing the lower access panel.
4
Lift the panel up to remove.
5
If still intact, depress the tabs to release the door switch from the bracket.
6
Note the orientation of the wires then disconnect them from the switch.
7
Install the new door switch by first connecting the wires to the terminals.
8
Now snap the new switch into place in the bracket.
9
Replace the lower access panel by aligning the bottom edge first.
10
Thread and tighten the screws to secure.
11
Realign the top edge of the upper access panel then thread the retaining knobs to secure.
12
With the repair completed turn the power back on and your furnace should be ready for use.

Applicable Product Model

Parts Needed
Total$0.00

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